Anti-fouling and anti-blocking device for air pre-heater of boiler

Abstract

The utility model discloses an anti-fouling device for a boiler air pre-heater, which belongs to the technical field of boiler air pre-heaters and comprises a boiler air pre-heater main body, air pre-heater pipe orifices are arranged at two ends of the boiler air pre-heater main body, a plurality of flue gas pipes are arranged in the boiler air pre-heater main body, and the flue gas pipes are horizontally arranged in the boiler air pre-heater main body at equal intervals. A plurality of fixing pieces are arranged in the boiler air pre-heater body at equal intervals, the edges of the fixing pieces are fixedly connected with the inner wall of the boiler air pre-heater body, the flue gas pipe penetrates through the fixing pieces, a pair of mounting holes are symmetrically formed in the upper end of the boiler air pre-heater body, and sound wave soot blowers are arranged in the four mounting holes. The sound wave soot blower is arranged in the tube box air pre-heater, compressed air is used for cleaning floating ash on the surface of a tube box through sound production of a horn, a dirt-blocked air pre-heater pipeline is dredged, the effect of cleaning accumulated ash of the tube box air pre-heater and a flue is achieved, the situation that the current of an induced draft fan is increased due to blockage of the air pre-heater is restrained, and the blowing-out cleaning work is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler air preheater technical field, concretely is a kind of boiler air preheater anti-fouling device. BACKGROUND

[0002] Boiler air preheater, namely boiler air preheater, is a kind of preheating equipment for improving the heat exchange performance of boiler and reducing heat loss, when flue gas passes through the flue gas side of air preheater, part of the heat carried by flue gas is transferred to the heat exchange element of air preheater, when the heat exchange element rotates to the air side, heat is transferred to the air before entering the boiler, and the heat of flue gas is recovered by air preheater, which reduces the exhaust gas temperature and increases the air temperature entering the boiler.

[0003] The existing boiler widely adopts pipe box type air preheater, due to the relatively backward equipment use technology, after the addition of denitration device under the strict environmental protection policy, the pipe box type low-temperature air preheater blocking problem is very frequent, especially in winter low-temperature period, the boiler operation low-temperature air preheater blocking phenomenon is obvious and begins to be serious, and the effect of boiler air preheater is reduced, which cannot meet the use requirement.

[0004] Some air preheater anti-fouling patents are disclosed in the prior art, wherein the utility model patent with patent announcement number CN207797088U discloses a boiler pipe type air preheater anti-fouling device, which comprises an air preheater body and a first horizontal rod, the air preheater body is provided with a mounting hole, a flue gas pipe is fixedly installed in the mounting hole, a fixed block is fixedly installed at the top of the left end of the air preheater body, a motor and a left stand are fixedly installed at the top of the fixed block, the motor is connected with an external power supply, a cam is fixedly installed at the front end of the rotating shaft of the motor, the vertical rod extends into the flue gas pipe, a scraping ring is connected to the side wall of the vertical rod through a fixed rod, and the outer side wall of the scraping ring is slidingly installed on the inner side wall of the flue gas pipe. Although the scraping ring is attached to the pipe wall of flue gas pipe, the scraping ring moves up and down under the control of cam, the cam removes the coal ash on the pipe wall under the control of motor, prevents the flue gas pipe from being blocked, and an alkali tank is arranged above the air preheater body, the alkali tank sprays alkali into the flue gas pipe through a spray head, the alkali and the acidic substances in flue gas are neutralized, the concentration of acidic substances is reduced, the formation of ammonium bisulfate is reduced, and the flue gas pipe is further prevented from being blocked. However, there is still the problem that the boiler operation low-temperature air preheater blocking phenomenon is obvious and begins to be serious in winter low-temperature period, the effect of boiler air preheater is reduced, and the use requirement cannot be met. UTILITY MODEL CONTENTS

[0005] The utility model discloses a boiler air preheater anti -fouling device to solve the problem that the boiler air preheater effect reduces and can not satisfy the use demand of the boiler air preheater effect reduction can not satisfy the use demand.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a boiler air preheater anti -fouling device, including the boiler air preheater main part, both ends of the boiler air preheater main part are provided with air preheater pipe orifice, the inside of boiler air preheater main part is provided with a plurality of flue gas pipes, just the flue gas pipe is horizontally equidistant and is arranged in the boiler air preheater main part, the inside of boiler air preheater main part is equidistant and is provided with a plurality of fixed pieces, the fixed piece brim is fixedly connected with the inner wall of boiler air preheater main part, and the flue gas pipe is provided through the fixed piece, a pair of mounting holes are symmetrically arranged on the empty upper end of the boiler air preheater main part, and the inside of four mounting holes is provided with acoustic soot blower.

[0007] Preferably, the upper end of the mounting hole is provided with a rubber ring, and the rubber ring is integrally connected with the boiler air preheater main body and the acoustic soot blower, and the rubber ring is arranged outside the acoustic soot blower.

[0008] Preferably, the two sides of the acoustic soot blower are symmetrically provided with two rotating rods, one end of the rotating rod is fixedly connected with the acoustic soot blower, the rotating rod is rotatably connected with the boiler air preheater main body, a motor is arranged in the boiler air preheater main body, and the motor is fixedly connected with the boiler air preheater main body, and the output end of the motor is connected with the other end of the corresponding rotating rod.

[0009] Preferably, the inside of the boiler air preheater main body is provided with a connecting disc, and the connecting disc is arranged on one side of the flue gas pipe, the inside of the flue gas pipe is provided with a connecting rod, and the end of the connecting rod is fixedly connected with the connecting disc, the outer wall of the connecting rod is provided with a cleaning brush, and the cleaning brush is fixedly connected with the connecting rod, the cleaning brush is arranged in the flue gas pipe, and the cleaning brush is attached to the inner wall of the flue gas pipe.

[0010] Preferably, the inside of the boiler air preheater main body is provided with two sliding grooves on the vertical inner wall of the connecting disc, the two sides of the connecting disc are provided with sliding blocks corresponding to the sliding grooves, and the sliding blocks are fixedly connected with the connecting disc, one end of the sliding block extends into the sliding groove, and the sliding block is slidably connected with the boiler air preheater main body, an electric push rod is arranged in the sliding groove, and the electric push rod is arranged on one side of the sliding block, and the electric push rod is fixedly connected with the boiler air preheater main body and the sliding block.

[0011] Preferably, the cleaning brush is provided with a plurality of through holes equidistantly along the length direction of the connecting rod.

[0012] Preferably, the upper end of the boiler air preheater body is provided with a transparent plate, and the transparent plate is integrally arranged with the boiler air preheater body.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The utility model discloses a device is through the setting of acoustic sootblower and rotating rod and motor, opens acoustic sootblower and produces compressed air, and compressed air is cleaned to the surface dust of pipe box through the sound of horn, and the dirtied air preheater pipeline is dredged, and the differential pressure of boiler pipe box type air preheater is reduced to the high speed, reaches the effect of cleaning pipe box air preheater and flue dust, and the motor drives the rotating rod to rotate, and along with the rotation of rotating rod acoustic sootblower is driven to rotate, changes acoustic sootblower installation angle, and compressed air is sprayed from different angles, and the ash removal treatment of better boiler air preheater is carried out.

[0015] 2. The utility model discloses a device is through the setting of connecting disc, sliding block, sliding slot, electric push rod, connecting rod and cleaning brush, and the electric push rod drives the sliding block to slide in the sliding slot, and along with the sliding of sliding block connecting rod is driven to reciprocating telescopic in the flue gas pipe, and cleaning brush is moved synchronously along with connecting rod and cleans the inner wall of flue gas pipe, effectively prevents the flue gas pipe from being blocked, and improves the effect of preventing boiler air preheater from being dirtied. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2 It is the connecting disc and the boiler air preheater body and flue gas pipe connection relation diagram of the utility model;

[0018] Figure 3 It is the acoustic sootblower and the boiler air preheater body connection section view of the utility model;

[0019] Figure 4 It is the cleaning brush and connecting disc connection structure diagram of the utility model;

[0020] Figure 5 It is the acoustic sootblower and the boiler air preheater body connection relation diagram of the utility model;

[0021] Figure 6 It is the cleaning brush and connecting rod connection structure diagram of the utility model.

[0022] In the figure: 1, boiler air preheater main body; 2, air preheater pipe; 3, flue gas pipe; 4, acoustic soot blower; 5, transparent plate; 6, connecting disc; 7, sliding block; 8, sliding slot; 9, electric push rod; 10, connecting rod; 11, cleaning brush; 12, fixed sheet; 13, mounting hole; 14, rubber ring; 15, rotating rod; 16, motor; 17, through hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0024] Please refer to Figures 1-6 An embodiment provided by the utility model: a boiler air preheater anti-fouling device, including boiler air preheater main body 1, the both ends of boiler air preheater main body 1 are provided with air preheater pipe 2, the inside of boiler air preheater main body 1 is provided with flue gas pipe 3, flue gas pipe 3 is provided with at least six, and flue gas pipe 3 is horizontally equidistantly arranged in the inside of boiler air preheater main body 1, the inside of boiler air preheater main body 1 is provided with fixed sheet 12, fixed sheet 12 is provided with four, and fixed sheet 12 is equidistantly arranged in the inside of boiler air preheater main body 1, the edge of fixed sheet 12 is fixedly connected with the inner wall of boiler air preheater main body 1, and flue gas pipe 3 is arranged through fixed sheet 12, the upper end of boiler air preheater main body 1 is provided with mounting hole 13, mounting hole 13 is provided with four, and four mounting holes 13 are symmetrically arranged on the north and south sides of the upper end of boiler air preheater main body 1, the inside of four mounting holes 13 is provided with acoustic soot blower 4, the upper end of four mounting holes 13 is provided with rubber ring 14, and rubber ring 14 is integrally connected with boiler air preheater main body 1 and acoustic soot blower 4, rubber ring 14 is arranged outside acoustic soot blower 4, the both sides of acoustic soot blower 4 are provided with rotating rod 15, rotating rod 15 is provided with two, and one end of rotating rod 15 is fixedly connected with acoustic soot blower 4, rotating rod 15 is rotatably connected with boiler air preheater main body 1, the inside of boiler air preheater main body 1 is provided with motor 16, and motor 16 is fixedly connected with boiler air preheater main body 1, the output end of motor 16 is connected with the other end of corresponding rotating rod 15.

[0025] When in use: after the boiler air preheater is used for a period of time, the acoustic soot blower 4 is started to generate compressed air according to the change of air preheater operating pressure difference, the compressed air is blown out through the horn to clean the floating ash on the surface of the pipe box, the blocked air preheater pipe is dredged, the rising speed of the boiler pipe box type air preheater pressure difference is slowed down, the cleaning effect of the pipe box air preheater and the flue ash is achieved, the motor 16 is started to drive the rotating rod 15 to rotate, the rotating rod 15 drives the acoustic soot blower 4 to rotate with the rotation of the rotating rod 15, the installation angle of the acoustic soot blower 4 is changed, the compressed air is sprayed from different angles, and the ash cleaning treatment of the boiler air preheater is better.

[0026] Please refer to Figure 2 , Figure 4 and Figure 6 , the inside of the boiler air preheater body 1 is provided with a connecting disc 6, and the connecting disc 6 is arranged on one side of the flue gas pipe 3, the inside of the flue gas pipe 3 is provided with a connecting rod 10, and one end of the connecting rod 10 is fixedly connected with the connecting disc 6, the outer wall of the connecting rod 10 is provided with a cleaning brush 11, and the cleaning brush 11 is fixedly connected with the connecting rod 10, the cleaning brush 11 is arranged in the inside of the flue gas pipe 3, and the cleaning brush 11 is attached to the inner wall of the flue gas pipe 3, two sliding grooves 8 are symmetrically arranged on the inner wall of the boiler air preheater body 1 perpendicular to the connecting disc 6, the two sides of the connecting disc 6 are provided with sliding blocks 7 corresponding to the sliding grooves 8, the sliding blocks 7 are provided with two, and the sliding blocks 7 are fixedly connected with the connecting disc 6, one end of the sliding block 7 extends into the inside of the sliding groove 8, and the sliding block 7 is slidingly connected with the boiler air preheater body 1, the inside of the sliding groove 8 is provided with an electric push rod 9, and the electric push rod 9 is arranged on one side of the sliding block 7, the electric push rod 9 is fixedly connected with the boiler air preheater body 1 and the sliding block 7, a through hole 17 is formed on the cleaning brush 11 along the length direction of the connecting rod 10, the electric push rod 9 drives the sliding block 7 to slide in the sliding groove 8, and the connecting rod 10 reciprocates in the flue gas pipe 3 with the sliding of the sliding block 7, the cleaning brush 11 moves synchronously with the connecting rod 10 to clean the inner wall of the flue gas pipe 3, effectively preventing the flue gas pipe 3 from being blocked, and improving the anti-fouling effect of the boiler air preheater.

[0027] Please refer to Figure 1 , the upper end of the boiler air preheater body 1 is provided with a transparent plate 5, and the transparent plate 5 is arranged integrally with the boiler air preheater body 1, and the inside condition of the boiler air preheater can be observed from the outside through the transparent plate 5.

[0028] Working principle: after the boiler air preheater is used for a period of time, the sound wave soot blower 4 is started to generate compressed air according to the change of the air preheater operating pressure difference, the motor 16 is started to drive the rotating rod 15 to rotate, the sound wave soot blower 4 is driven to rotate with the rotation of the rotating rod 15, the installation angle of the sound wave soot blower 4 is changed, the compressed air is sprayed from different angles, the compressed air is sounded through the horn to clean the floating dust on the surface of the pipe box, the blocked air preheater pipe is dredged, the rising speed of the boiler pipe box type air preheater pressure difference is slowed down, the cleaning effect of the pipe box air preheater and the flue dust is achieved, the electric push rod 9 drives the sliding block 7 to slide in the sliding groove 8, the connecting rod 10 reciprocates in the flue gas pipe 3 with the sliding of the sliding block 7, the cleaning brush 11 moves synchronously with the connecting rod 10 to clean the inner wall of the flue gas pipe 3, effectively preventing the flue gas pipe 3 from being blocked, and improving the anti-fouling effect of the boiler air preheater.

[0029] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0030] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler air preheater anti-fouling device, characterized in that: The utility model relates to a boiler air preheater body (1) is provided with air preheater pipe orifice (2) at both ends, and the inside of boiler air preheater body (1) is provided with several flue gas pipes (3), and the inside of boiler air preheater body (1) is provided with several fixed sheets (12) equidistance, and the fixed sheet (12) edge and boiler air preheater body (1) inner wall fixed connection, and the flue gas pipe (3) passes through fixed sheet (12) and is provided, and the empty upper end of boiler air preheater body (1) is provided with a pair of mounting hole (13) symmetry, and the inside of four mounting hole (13) is provided with acoustic wave soot blower (4).

2. A boiler air preheater anti-fouling device according to claim 1, characterized in that: The upper end of the mounting hole (13) is provided with a rubber ring (14), and the rubber ring (14) is connected with the boiler air preheater body (1) and the acoustic wave soot blower (4) as a whole, and the rubber ring (14) is arranged outside the acoustic wave soot blower (4).

3. The boiler air preheater anti-fouling device according to claim 1, characterized in that: The both sides of the acoustic wave soot blower (4) are symmetrically provided with two rotating rods (15), one end of the rotating rod (15) is fixedly connected with the acoustic wave soot blower (4), the rotating rod (15) is rotatably connected with the boiler air preheater body (1), the inside of the boiler air preheater body (1) is provided with a motor (16), and the motor (16) is fixedly connected with the boiler air preheater body (1), the output end of the motor (16) is connected with the other end of the corresponding rotating rod (15).

4. The boiler air preheater anti-fouling device according to claim 1, characterized in that: The inside of the boiler air preheater body (1) is provided with a connecting disc (6), and the connecting disc (6) is arranged on one side of the flue gas pipe (3), the inside of the flue gas pipe (3) is provided with a connecting rod (10), and the end of the connecting rod (10) is fixedly connected with the connecting disc (6), the outer wall of the connecting rod (10) is provided with a cleaning brush (11), and the cleaning brush (11) is fixedly connected with the connecting rod (10), the cleaning brush (11) is arranged in the flue gas pipe (3), and the cleaning brush (11) is attached to the inner wall of the flue gas pipe (3).

5. A boiler air preheater anti-fouling device according to claim 4, characterized in that: Two chute (8) are symmetrically arranged on the vertical inner wall of the boiler air preheater body (1) and the connecting disc (6), and a sliding block (7) is arranged on the both sides of the connecting disc (6) corresponding to the chute (8), and the sliding block (7) is fixedly connected with the connecting disc (6), one end of the sliding block (7) extends into the chute (8), and the sliding block (7) is slidably connected with the boiler air preheater body (1), and an electric push rod (9) is arranged in the chute (8), and the electric push rod (9) is arranged on one side of the sliding block (7), and the electric push rod (9) is fixedly connected with the boiler air preheater body (1) and the sliding block (7).

6. A boiler air preheater anti-fouling device according to claim 5, characterized in that: A plurality of through holes (17) are equidistantly formed in the cleaning brush (11) along the length direction of the connecting rod (10).

7. A boiler air preheater anti-fouling device according to claim 1, characterized in that: A transparent plate (5) is arranged on the upper end of the boiler air preheater body (1), and the transparent plate (5) is integrally arranged with the boiler air preheater body (1).

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